Maggio, people are crappy, there will always be people who look down on other people. If it isn't language, it's because they are fat, or because the smell weird. Or because they have a ritual that involves cutting the neck off a chicken and drinking the blood.
My points are human beings are judgmental. People never see themselves as being judgmental at the time, only what they perceive as offensive to them. Kind of like how you talked about how you looked or treated shiva for poor English in the past.
I know I'm taking this in the broader context. But I think it applies to every situation. Instances like Racism, sexism, nationalism, and any other prejudices people have.
It has nothing to do with why English shouldn't be the only official language of the United States in my opinion.